Hi Siggi,
The PG506 specs mention delay time 18 ns between trigger out and Hi Ampl pulse out. I don' know of course how much delay time is added by your home made pulse generator. But if you didn't deliberately build in a delay there then the total delay time likely as much less than required to see the same-as-triggered-on leading edge at the sampling combination. Hence you might be looking at the leading edge of the next pulse and jitter will include the between-pulses jitter of the PG506.
Small Tek TD pulse generators were driven by the scopes calibrator output or unterminated PG506 Hi Ampl output, with relatively slow rise times. Roger looked at the terminated Hi Ampl output. What is your design?
Albert
Hi Siggi,
I tried my very early PG506 with a 7904 / 7A29 or 7A16p / 7B92A. I can't
measure any jitter between the trigger output and the fast rise outputs at the
50-100psec level. The rise time of the high amplitude output into 50ohm is
about 10nsec and due to the time delay between the trigger and high amplitude
pulse I have to use the delayed sweep on the 7B92A to get to 1nsec/div so more
uncertainty but the jitter is at the 100ps or less level. 1.5nsec sounds like
something badly wrong.
Roger
as reply to
I have a little shop-made TD pulser I drive off my PG506 high ampl output.
I also now have a 7S12 with an S-4 and an S-53, so I figured I'd be able to
look at the rise of my pulser, as the PG506 has a TRIG OUT. When I pulled in close, however, it was all fuzz on the sampling gitup. Initially I figured my newly ePrayed S-53 might be wonked out, but I'm seeing the same thing on the venerable 2467.
Looks like ~1.5ns of jitter - is this typical?
Siggi
